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• hey i need to download my coaching classes but they are using hls aes 128 bit encrypted streams. i downloaded m3u8 and all .ts files and found enc key

  19 mars 2023, par tinu one

  I downloaded all the .ts files using a python script but it is encrypted with aes 128.i found a encryption key (supposedly) under the network tab in developer options. I ran it through ffmpeg but got an error( invalid data found while processing ). I need these classes because they are going to remove it in may 2023. i am a noob to this and may have done step wrong. Please forgive me. I would deeply appreciate anyone who will help me find a solution to this problem. Thankyou.

  


  I downloaded all the .ts files and m3u8 file and put it inside a folder. I hosted the key file in localhost that I found under the preview tab of the network tab in developer options( it was named key/ after all and had characters which was not human readable. it also had the request URL similar to that inside the m3u8 file)because ffmpeg did not want to read the key file from my local pc. I edited the m3u8 file to access the key stored in local host and it read successfully. but it shows error( invalid data found while processing).

  


  encryption key from preview tab I found : Ø®¢Ù¦Aä [u
request url of the key : https://classes.brilliantpala.org/api/v2.5/video_contents/42475/key/

  


  unedited m3u8 file :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:19
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-KEY:METHOD=AES-128,URI="https://classes.brilliantpala.org/api/v2.4/encryption_key/40cd559c70c241699cfcda9072c4fb42/",IV=0x00000000000000000000000000000000
#EXTINF:11.680000,
video_0.ts
#EXTINF:10.000000,
video_1.ts
#EXTINF:10.000000,
etc etc..


  


  fetch("https://classes.brilliantpala.org/api/v2.5/video_contents/42475/key/", {
  "headers": {
    "accept": "*/*",
    "accept-language": "en-US,en;q=0.9",
    "sec-ch-ua": "\"Microsoft Edge\";v=\"111\", \"Not(A:Brand\";v=\"8\", \"Chromium\";v=\"111\"",
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": "\"Windows\"",
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-key": "5e5d8c5d0486a678ccd4935ecb9fa8a01b1db7327396184ab00b50573119e947"
  },
  "referrer": "https://classes.brilliantpala.org/courses/535/contents/42475/",
  "referrerPolicy": "strict-origin-when-cross-origin",
  "body": null,
  "method": "GET",
  "mode": "cors",
  "credentials": "include"
});```




  


• ffmpeg messes up delayed inputs (repeats at the beginning)

  20 mars 2023, par Ralph

  ffmpeg plays audio inputs delayed to t1, t2 etc at t=0.
If there are several inputs, then it replicates one after the other (after in0 finishes with its duration duration(in0), plays another one at t=duration(in0), etc.)

  


  In the following example, the in0 is played at t=0.

  


  ffmpeg -i in0.mp3 -i in1.mp3 -i in2.mp3 -filter_complex "[0]adelay=1000[delayed1];[1]adelay=2000[delayed2];[2]adelay=3000[delayed3];[delayed1][delayed2][delayed3]amix=inputs=3:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3


  


  The command performs the following : 1. The ffmpeg processes three input files (mp3). 2. The complex filter delays the inputs by 1, 2, 3 seconds input-wise. 3. amix mixes the delayed outputs together. 4. And finally, a coded transforms it into an output mp3.

  


  Another short version : 2 delayed beeps, an finally there come 3 beeps out (@ 0, 1, 2 seconds) :

  


  ffmpeg -i beep.mp3 -filter_complex "[0]adelay=1000[delayed1];[0]adelay=2000[delayed2];[delayed1][delayed2]amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3


  


  ffmpeg version N-110011-gf456c192d9-tessus on a Mac M1, downloaded as binary from https://evermeet.cx/ffmpeg (01.2023).

  


  I added also a silent input file from 0 to 1 seconds without any alteration of the outcome.
I added a silent stream as input as well without improvement. E.g. :

  


  ... -filter_complex "aevalsrc=0:d=4[silence];...


  


  Another test with another ffmpeg version 5.1 Copyright (c) 2000-2022 the FFmpeg developers built with Apple clang version 13.1.6 (clang-1316.0.21.2.5) :
ffmpeg -i beep.mp3 -filter_complex "[0]adelay=1000[delayed1];aevalsrc=0:d=5[silence];[silence][delayed1]amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3
There are again 2 beeps, at 0 and 1 second.

  


  (comment : concat solves the issue. But I want to have a flexible solution with possibly overlapping audio streams.) Thanks for giving a hint !

  


• Permission deneied android 14 FFmpeg [closed]

  26 décembre 2023, par Aarav Raj

  I have inserted log

  


  ffmpeg -hwaccel auto -y -i "/storage/emulated/0/DCIM/Camera/20231217_205048.mp4" -c:v libaom-av1 -q:v 5 -c:a libmp3lame -ab 128k -ar 44100 "/storage/emulated/0/DCIM/Camera/20231217_205048.avi"

  


  ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers

  


  built with gcc 4.9.x (GCC) 20150123 (prerelease)

  


  configuration : —enable-version3 —enable-gpl —enable-nonfree —disable-indev=v4l2 —enable-libmp3lame —enable-libx264 —enable-libx265 —enable-libvpx —enable-libvorbis —enable-libtheora —enable-libopus —enable-libfdk-aac —enable-libfreetype —enable-libass —enable-libfribidi —enable-fontconfig —enable-pthreads —enable-libxvid —enable-filters —enable-openssl —enable-librtmp —disable-protocol='udp,udplite' —enable-libopencore-amrwb —enable-libopencore-amrnb —enable-libvo-amrwbenc —enable-libspeex —enable-libsoxr —enable-libwebp —enable-libxml2 —enable-libopenh264 —enable-jni —prefix=/home/silentlexx/AndroidstudioProjects/ffmpeg/ffmpeg/build/arm64-api21-r13b —sysroot=/home/silentlexx/Android/android-ndk-r13b/platforms/android-21/arch-arm64 —arch=arm64 —disable-shared —enable-static —enable-pic —enable-ffmpeg —disable-ffplay —disable-ffprobe —disable-ffnvcodec —disable-avdevice —disable-debug —disable-doc —disable-htmlpages —disable-manpages —disable-podpages —disable-txtpages —disable-symver —cross-prefix=/home/silentlexx/Android/android-ndk-r13b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android- —target-os=android —enable-cross-compile —pkg-config-flags=—static —extra-libs='-lgnustl_static -lm -lpng -l:libz.so -lpthread' —enable-asm —enable-neon —enable-libxavs2 —enable-libdav1d —enable-libaom —enable-small

  


  libavutil 58. 2.100 / 58. 2.100

  


  libavcodec 60. 3.100 / 60. 3.100

  


  libavformat 60. 3.100 / 60. 3.100

  


  libavfilter 9. 3.100 / 9. 3.100

  


  libswscale 7. 1.100 / 7. 1.100

  


  libswresample 4. 10.100 / 4. 10.100

  


  libpostproc 57. 1.100 / 57. 1.100

  


  /storage/emulated/0/DCIM/Camera/20231217_205048.mp4 : Permission deni
ed

  


  When i tried to convert a mp4 to av1 it showed me this error.